Program: Truecombat Elite
License: Open Source/Freeware
Description: TrueCombat: Elite (TC:E or TC:Elite) is a total-conversion modification by Team Terminator and Groove Six Studios for the freeware first person shooter game Wolfenstein: Enemy Territory, started in the late 2004. The modification is in the tactical realism genre and supports Windows, Linux and Mac operating systems. It is an offspring to a Quake 3 modification called TrueCombat, which holds some similarity in the game mechanics.
Website: http://tcelite.net
Download: http://www.truecombatelite.net/component/option,com_remository/Itemid,40/